Please advise where I can find actual previous exams for practice.
actual previous mock exams can be gotten from prior test takers, or google.
Actual CFA exams are never released, so to to get actual previous exams, you would need to get them from the CFAI or hack their database.
Previous L3 written exams are available for the last few years, but the multiple choices questions are not available, outside of a few small sample exams that are not nearly full length.